| US 7,540,982 B2 | ||
| Molding lens with indentation for measuring eccentricity and method for measuring eccentricity thereof | ||
| San-Woei Shyu, Taipei (Taiwan); Chi-Hsiung Wang, Taipei (Taiwan); and Chih-Hsiung Huang, Taipei (Taiwan) | ||
| Assigned to E-Pin Optical Industry Co., Ltd., Taipei (Taiwan) | ||
| Filed on Sep. 27, 2007, as Appl. No. 11/902,974. | ||
| Application 11/902974 is a division of application No. 11/583982, filed on Oct. 20, 2006, granted, now 7,349,161. | ||
| Prior Publication US 2008/0093759 A1, Apr. 24, 2008 | ||
| Int. Cl. B29D 11/00 (2006.01); B29C 45/76 (2006.01); G02B 3/00 (2006.01); G01B 9/00 (2006.01) | ||
| U.S. Cl. 264—1.32 [356/127; 264/40.1; 264/2.5] | 4 Claims |
| 1. A method for measuring eccentricity of a molding lens comprising steps of:
manufacture a lens mould and present projecting parts concentric with optical surfaces on an area outside the optical surfaces
of a front plane and a rear plane of the lens mould;
produce lens by the lens mould so that indentations concentric with the optical surfaces are respectively formed on the front
plane and the rear plane;
use a microscopic measuring device to observe and measure the indentations as well as lens periphery;
use the indentations and lens periphery to measure eccentricity of the optical surface of the lens.
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